可聚合表面活性剂的应用研究

可聚合表面活性剂含有聚合活性基团,在无皂乳液聚合、纳米材料制备等新兴领域得到应用.主要综述了可聚合表面活性剂在溶液中可形成的微观有序组合体结构类型,分别论述了它们的应用性能,并对其研究趋势进行了展望.     

数字视频监控系统设计与实现

介绍了一种数字视频监控系统,给出该系统的具体实现方案,并对其中的关键技术进行了深入分析。该系统结构合理、功能完善、运行可靠。通过测试白天和夜晚的监控效果图,该视频监控系统达到了最初技术要求,具有很好的实用性。     

单宁改性酚醛树脂的研制

介绍了用橡碗单宁制备改性酚醛树脂的合成工作，并以水为溶剂进行了改性酚醛树脂的粘接性能研究，讨论了固化温度，固化时间对粘接强度的影响。     

固定床煤气化气体精制技术的开发

1.绪言煤炭火力发电和原子能发电部是未来最有力的发电方式。特别是煤气化联合发电装置具有效率高、经济性好、环保性好等特点,因此,可望能早期实用化。美国从1984年开始,顺利地进行了1000吨/天煤气化联合发电装置示范研究(冷水工程项目)。在这种背景下,日本资源能源厅从1986年     

耐高温的多层包装薄膜及其制品

<正> 西德专利3339836介绍了一种多层耐高温包装膜及其制品的制造方法。该包装材料耐热,抗压,耐磨损性好。可在温度为70—120℃的容器内处理10分钟至15小时,因此最适宜用于食品包装,可作成食品包装袋等制品.这种多层包装材料外层所用的异分子聚胺,可用至少两种不同的聚酰胺单体进行异分子聚合制成,其熔点为120℃—240℃,     

Inhibitory effect of Cr（Ⅵ） on activities of soil enzymes

To evaluate the influence of various Cr(VI) concentrations (0.05, 0.25, 0.50, 1.00 and 2.00 g/kg) on the activity of soil enzymes, the activities of catalase, polyphenol oxidase, dehydrogenase, alkaline phosphatase in soils were investigated in the incubation experiment with a period of 35 d. The results indicate that all the tested Cr(VI) concentrations significantly inhibit dehydrogenase activity by over 70% after 35 d. The activity of alkaline phosphatase is slightly inhibited during the whole experiment except for on the day 7. Cr(VI) has no obvious effect on the activity of catalase in soil. On the contrary, Cr(VI) stimulates the activity of polyphenol oxidase. The results suggest that dehydrogenase activity can be used as an indicator for assessing the severity of chromium pollution. Foundation item: Projects(2006AA06Z374, 2007AA021304) supported by the National High-Tech Research and Development Program of China; Project(2008SK2007) supported by the Key Program of Science and Technology of Hunan Province, China     

矿产勘查生产要素配置中政府和市场作用分析

矿产资源是经济社会发展的重要物质基础,是国家安全的战略保障。党的二十大要求“构建全国统一大市场,深化要素市场化改革,建设高标准市场体系”,强调“充分发挥市场在资源配置中的决定性作用,更好发挥政府作用”。本文分析了近年来矿产勘查生产要素配置现状,梳理了矿产勘查中政府和市场关系演变和作用机制,从充分发挥市场决定性作用、构建“有效市场”和更好发挥政府作用、塑造“有为政府”两个方面提出对策建议,以期为充分发挥政府和市场两个主体在矿产勘查生产要素配置中的作用提供一些思路。     

基于溶剂沥青的冷再生沥青混合料性能评价

传统的沥青混合料冷再生技术有乳化沥青和泡沫沥青冷再生,本研究尝试采用所开发的溶剂沥青作为结合料对废旧沥青混合料进行冷再生,提出了试件的成型和养生方法,进行了配合比组成设计并采用热拌沥青混合料的标准对溶剂沥青冷再生混合料的性能进行评价.试验结果表明,溶剂沥青冷再生混合料的水稳定性能、高温稳定性能均满足我国热拌改性沥青混合料规范的性能要求,低温性能虽然不满足改性沥青混合料的要求,但能满足普通沥青混合料规范的性能要求.     

具周期边界的神经传播型方程的初边值问题解的存在唯一性

神经传播型方程的研究是非线性科学和神经科学交叉的前沿课题,既有实际应用背景,又有重要的理论意义.讨论了具周期边界的神经传播和非线性波动混合型方程的初边值问题,利用Galerkin方法及Sobolev空间理论证明了问题整体解的存在唯一性.     

Behavior,distribution and environmental influence of arsenic in a typical lead smelter

A field study was conducted to determine the behavior and distribution of arsenic during the pyrometallurgy process in a typical SKS(Shuikoushan) lead smelter in Hunan province, China. Environmental influences of arsenic in selected samples were evaluated. Arsenic contents in all input and output samples vary from 0.11% in raw lead to 6.66% in collected dust-2. More arsenic is volatilized in blast furnace and fuming furnace(73.02% of arsenic input) than bottom blowing furnace(10.29% of arsenic input).There are 78.97%, 13.69%, 7.31% of total arsenic distributed in intermediate materials, stockpiled materials and unorganized emissions, respectively. Matte slag-2, collected dust-1 and secondary zinc oxide are hazardous based on the arsenic concentrations of toxicity characteristic leaching procedure. According to risk assessment code(RAC) guideline, arsenic in collected dust-1 poses a very serious risk to the surrounding environment, arsenic in speiss, matte slag-2, water-quenched slag and secondary zinc oxide show low risk, while arsenic in matte slag-1, collected dust-2 and post dust has no risk to the environment.